11205274621 has 8 divisors (see below), whose sum is σ = 11481382584. Its totient is φ = 10929300480.

The previous prime is 11205274609. The next prime is 11205274673. The reversal of 11205274621 is 12647250211.

It can be written as a sum of positive squares in 4 ways, for example, as 72914521 + 11132360100 = 8539^2 + 105510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11205274621 - 2⁵ = 11205274589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11205271621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148045 + ... + 210541.

It is an arithmetic number, because the mean of its divisors is an integer number (1435172823).

Almost surely, 2^11205274621 is an apocalyptic number.

It is an amenable number.

11205274621 is a deficient number, since it is larger than the sum of its proper divisors (276107963).

11205274621 is an equidigital number, since it uses as much as digits as its factorization.

11205274621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66911.

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 11205274621 in words is "eleven billion, two hundred five million, two hundred seventy-four thousand, six hundred twenty-one".